51860219 has 2 divisors, whose sum is σ = 51860220. Its totient is φ = 51860218.

The previous prime is 51860209. The next prime is 51860267. The reversal of 51860219 is 91206815.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51860219 is a prime.

It is a super-2 number, since 2×51860219² = 5378964629455922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51860209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25930109 + 25930110.

It is an arithmetic number, because the mean of its divisors is an integer number (25930110).

Almost surely, 2^51860219 is an apocalyptic number.

51860219 is a deficient number, since it is larger than the sum of its proper divisors (1).

51860219 is an equidigital number, since it uses as much as digits as its factorization.

51860219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 51860219 is about 7201.4039603400. The cubic root of 51860219 is about 372.9163705972.

The spelling of 51860219 in words is "fifty-one million, eight hundred sixty thousand, two hundred nineteen".